ImberbeSenior Virtual Ranger
Joined: Wed Aug 31, 2005 12:28 am
Posts: 14342
Location: Pretoria, RSA
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| Bird Quizz (RV) |
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Imberbe Senior Virtual Ranger Joined: Wed Aug 31, 2005 12:28 am Posts: 14342 Location: Pretoria, RSA
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| Thu Jul 19, 2012 7:10 pm |
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| Re: Bird Quizz (RV) |
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ndloti Senior Virtual Ranger Joined: Mon Dec 11, 2006 1:45 pm Posts: 5602 Location: Thankfully not in a city
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| Fri Jul 20, 2012 8:44 am |
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Pied babbler ?
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| Re: Bird Quizz (RV) |
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onewithnature Distinguished Virtual Ranger Joined: Tue Dec 23, 2008 5:22 am Posts: 19081 Location: Midway between the infinite and the infinitesimal!
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| Sat Jul 21, 2012 12:59 am |
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Penguins?
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Rooies Senior Virtual Ranger Joined: Wed Jan 10, 2007 3:44 pm Posts: 2869 Location: Welkom
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| Sat Jul 21, 2012 6:31 am |
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I think it is some or other water bird like a coot or something.
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Roan Joined: Thu Apr 26, 2012 11:22 pm Posts: 239 Location: Bela-Bela, Limpopo
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| Sun Aug 05, 2012 8:57 pm |
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Hi all
 Been a while. Got tangled up in the rat race. Think big on the birds  |
| Re: Bird Quizz (RV) |
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Imberbe Senior Virtual Ranger Joined: Wed Aug 31, 2005 12:28 am Posts: 14342 Location: Pretoria, RSA
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| Sun Aug 05, 2012 11:37 pm |
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Ostrich
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| Re: Bird Quizz (RV) |
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Roan Joined: Thu Apr 26, 2012 11:22 pm Posts: 239 Location: Bela-Bela, Limpopo
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| Tue Aug 07, 2012 8:29 pm |
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Well done Imberbe! You are it. . .
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| Re: Bird Quizz (RV) |
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Imberbe Senior Virtual Ranger Joined: Wed Aug 31, 2005 12:28 am Posts: 14342 Location: Pretoria, RSA
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| Tue Aug 07, 2012 9:12 pm |
 I will not be able to post for a few days ... First to post is IT! |
| Re: Bird Quizz (RV) |
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onewithnature Distinguished Virtual Ranger Joined: Tue Dec 23, 2008 5:22 am Posts: 19081 Location: Midway between the infinite and the infinitesimal!
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| Wed Aug 08, 2012 9:06 am |
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Why do birds of prey spiral when moving in an upward direction in the sky?
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| Re: Bird Quizz (RV) |
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Rooies Senior Virtual Ranger Joined: Wed Jan 10, 2007 3:44 pm Posts: 2869 Location: Welkom
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| Wed Aug 08, 2012 9:58 am |
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onewithnature wrote Why do birds of prey spiral when moving in an upward direction in the sky? To stay in the hot wind currents that goes upwards. |
| Re: Bird Quizz (RV) |
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onewithnature Distinguished Virtual Ranger Joined: Tue Dec 23, 2008 5:22 am Posts: 19081 Location: Midway between the infinite and the infinitesimal!
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| Fri Aug 10, 2012 12:48 am |
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Yes, Rooies, but then why spiral - why not just float upwards on extended wings?
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| Re: Bird Quizz (RV) |
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Rooies Senior Virtual Ranger Joined: Wed Jan 10, 2007 3:44 pm Posts: 2869 Location: Welkom
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| Fri Aug 10, 2012 8:18 am |
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I will take a wild guess here. The updrafts doesn't stay in the same place and moves constantly. The birds must go in circles to test and exploit the best currents.
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onewithnature Distinguished Virtual Ranger Joined: Tue Dec 23, 2008 5:22 am Posts: 19081 Location: Midway between the infinite and the infinitesimal!
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| Sat Aug 11, 2012 6:36 am |
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Intelligent guess, Rooies, but not exactly correct.
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| Re: Bird Quizz (RV) |
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Imberbe Senior Virtual Ranger Joined: Wed Aug 31, 2005 12:28 am Posts: 14342 Location: Pretoria, RSA
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| Tue Aug 21, 2012 11:18 pm |
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The updraft can be likened to a bubble of air which is created when you boil water. The bubble starts at the bottom and then moves upward, eventually detaching itself from the area where it started. It can also move horisontally across the landscape at the same time.
Though it is much bigger than the boiling water bubble, it remains rather confined and the birds needs to keep within this updraft to get the lift. To achieve this, it needs to spiral within the bubble. Some birds are not able to spiral in such a confined space and can therefore not use the updrafts effectively. |
| Re: Bird Quizz (RV) |
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onewithnature Distinguished Virtual Ranger Joined: Tue Dec 23, 2008 5:22 am Posts: 19081 Location: Midway between the infinite and the infinitesimal!
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| Wed Aug 22, 2012 1:18 am |
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IB :clap:
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